Ater and Arbus are the two archdemon twins who are currently serve as your underlings. Due to their demonic nature, they both can't die from natural causes, such as aging or disease and also regenerate body parts, even guts and bones. They can fly with their wings and transform into their cat form, for they are the cats. Ater's cat form is white, while Arbus' is black. The two of them are rarely ever seen apart and they work together. They both are 160 cm tall.